Can you hear that far-off roar? It's Space Runaway Ideon!
I picked up this series to watch as part of a simulwatchathon on another forum after hearing about it for years. It's one of the major inspirations for Eva, for one thing.
The basic plot is that in some ruins, humans find three machines. Upon getting attacked by the Buff Clan, they manage to form the "Legendary God", Ideon, and go into space. It's interesting to see a super robot anime where the characters don't instantly know everything about the robot in question, and there's not universal communication. Also, on just a sci-fi level, it's very interesting to see a show where the aliens aren't significantly more advanced than humans, and are both at kinda this same semi-low level, where interstellar travel is known but difficult, etc. It seems like it's going to be an interesting show, and it was never licensed, so I don't even have to feel guilty about linking to a torrent